Method of preparing catalyst for polymerization of aliphatic polycarbonate and method of polymerizing aliphatic polycarbonate using same

Abstract

Disclosed is a method of preparing a catalyst for polymerization of an aliphatic polycarbonate including oxidizing a dicarboxylic acid precursor and a zinc precursor under a pressurized condition, and a method for polymerizing the aliphatic polycarbonate.

1. A method of preparing a single crystalline catalyst for polymerization of an aliphatic polycarbonate, comprising:
 oxidizing a dicarboxylic acid precursor and a zinc precursor under a pressurized condition in water, wherein the dicarboxylic acid precursor is selected from the group consisting of pentanediol, 1,5-dibromopentane, 1,5-dichloropentane, glutaronitrile, glutamic imide, and glutaryldialdehyde. 
 
     
     
       2. The method of  claim 1 , wherein the equivalent ratio of the zinc precursor and the dicarboxylic acid precursor is 1:3 to 3:1. 
     
     
       3. The method of  claim 1 , wherein the oxidation is performed at a temperature between 120 and 180° C. 
     
     
       4. The method of  claim 1 , wherein the dicarboxylic acid precursor and the zinc precursor are respectively 0.1 to 50 volume % of water. 
     
     
       5. The method of  claim 4 , wherein the dicarboxylic acid precursor and the zinc precursor are respectively 1 to 50 volume % of water. 
     
     
       6. The method of  claim 1 , wherein the zinc precursor is selected from the group consisting of zinc acetate dihydrate, zinc hydroxide, zinc nitrate hexahydrate, zinc perchlorate hexahydrate, zinc oxide and zinc sulfate. 
     
     
       7. A method of polymerizing an aliphatic polycarbonate, comprising:
 copolymerizing alkylene oxide and carbon dioxide in the presence of the catalyst which is prepared according to the method of  claim 1 .